A zero-emission two-stroke ignition hydrogen-oxygen engine and its control method

Abstract

The invention provides a zero-emission two-stroke ignition-type hydrogen-oxygen engine and a control method, and specifically relates to a fuel supply system, a water spray system, an exhaust energy recovery system and control of a zero-emission two-stroke ignition-type hydrogen-oxygen engine. The hydrogen and oxygen in the engine enter the cylinder through the hydrogen nozzle and the oxygen nozzle respectively, and are quickly ignited after the spark plug flashes, so as to realize the high-efficiency constant-volume combustion process. The water nozzle sprays water to cool down the compression and combustion process in the cylinder according to the control of the electronic control unit, so as to ensure that the mixture will not spontaneously ignite and the body parts will not be damaged due to the increase in heat load caused by hydrogen-oxygen combustion. The tail gas energy recovery device and the heat exchanger carry out two-stage utilization of the high-temperature tail gas waste heat generated by combustion, which increases the thermal power conversion efficiency of the technical solution provided by the present invention. The invention truly realizes zero harmful emission operation of the engine by adopting hydrogen-oxygen combustion.

Description

technical field [0001] The invention provides a zero-emission two-stroke ignition-type hydrogen-oxygen engine and a control method, and specifically relates to a fuel supply system, a water spray system, an exhaust energy recovery system and control of a zero-emission two-stroke ignition-type hydrogen-oxygen engine. Background technique [0002] Most current engines use air as the oxidant during combustion, but N2 in the air easily reacts with O2 to generate NOx emissions under the high temperature conditions of the engine combustion chamber, thus causing air pollution when the motor vehicle is running. Although existing three-way catalytic converters and selective catalytic reduction systems can reduce NOx emissions, they cannot completely eliminate NOx emissions generated during engine operation. From the perspective of NOx generation mechanism, if the engine uses pure oxygen as the oxidant and cooperates with N-free fuel combustion, NOx emissions can be completely elimina...

AI Technical Summary

Problems solved by technology

[0008] In view of the low power density, poor efficiency, and high harmful emissions of the current four-stroke engines, when pure hydrogen and oxygen are mixed in the engine cylinder at a stoichiometric ratio and then ignited, the explosion pressure in the cylinder and the combustion temperature of the mixture are too high, and the pure hydrogen and oxygen The invention provides a zero-emission two-stroke ignition-type hydrogen-oxygen engine and its control method to solve the problems of waste heat recovery of high-temperature products after combustion in the engine.

Images